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Quietforge Sudoku Generator
x402
Quietforge Sudoku Generator is a paid API for AI agents from qf-api.quietforge-studio.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Generates solver-verified, technique-graded Sudoku puzzles in JSON format, with optional seeding for reproducibility and configurable counts per difficulty level.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call document conversion, PDF text extraction, headless-browser rendering of a URL or HTML to PNG / JPEG / PDF, a health-probed directory of x402 pay-per-call endpoints, a sudoku generator (solver-verified, technique-graded puzzles as JSON or a print-ready A4/Letter book), a book typesetter (prose manuscript to a KDP-ready interior PDF + editable docx), a crossword generator (verified freeform grid from your clue/answer pairs as JSON or print-ready PDFs), a family tree chart layout engine (descendant / ancestor / hourglass charts from people+families JSON or a GEDCOM file, as verified layout JSON or print-ready poster and tiled PDFs), and a dataset quality audit tool (duplicates, missing values, type consistency, class imbalance, numeric outliers and PII-pattern counts for a CSV/JSON dataset, as JSON or a one-page PDF summary). Payment: x402 (USDC on Base). No signup, no API key.
Output
Returns a JSON object containing the seed used, total puzzle count, format description, grading criteria per level, and an array of puzzle objects each with: puzzle number, difficulty level, number of givens, an 81-character puzzle string (0=empty), an 81-character solution string, a list of solving techniques required, symmetry type, elapsed generation time in ms, and a boolean confirming the solution is unique.
Example use cases
Puzzle app daily challenge feed
“I need 5 hard sudoku puzzles and 5 expert ones using seed 999 so I can reproduce the same set tomorrow — include solutions and list the techniques needed to solve each one.”
Educational worksheet with varied difficulty
“Can you generate 4 sudoku puzzles for a classroom worksheet — 2 easy and 2 medium ones — with their solutions included so the teacher has an answer key?”
Reproducible test fixtures for a sudoku solver
“Give me 3 expert-level sudoku puzzles using seed 7777 so I always get the same puzzles, and include the full solution strings and which techniques are required — I'm using them to test my solver.”
Technical details
Endpoint
POSThttps://qf-api.quietforge-studio.workers.dev/v1/sudoku?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need programmatically generated, solver-verified Sudoku puzzles with explicit technique grading and solutions in a structured JSON format. It is ideal for puzzle apps, educational tools, testing sudoku solvers, or generating reproducible puzzle sets via seed. Prefer this over generic puzzle APIs when you need confirmed unique solutions and transparent solving technique metadata. Payment via x402/USDC on Base means no account signup or API key management.
Side effects
- Total puzzle count exceeds 20 — returns validation error
- Invalid difficulty level key in counts object — ignored or returns error
- Payment not provided or insufficient USDC via x402 — returns 402 Payment Required
- Malformed JSON body — returns 400 Bad Request
- Seed produces no valid puzzle within time limits — may return timeout or empty result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | Optional; same seed + counts = same puzzles |
| counts | object | Puzzles per level; total 1-20 |
Output
Schema · Response
{
"type": "json",
"example": {
"seed": 12345,
"count": 1,
"format": "puzzle/solution: 81 characters, row by row, 0 = empty",
"grading": {
"easy": "naked + hidden singles only",
"hard": "+ naked triples, hidden pairs, X-wing",
"expert": "those techniques are not enough",
"medium": "+ naked pairs, pointing pairs, box-line reduction"
},
"puzzles": [
{
"n": 1,
"level": "hard",
"givens": 26,
"puzzle": "000200090000000450080000000970000006000508000600000023000000060032000000010007000",
"solution": "351264897296873451487159362973421586124538679658796123745312968832945716519687234",
"techniques": [
"hidden single",
"naked single",
"box-line reduction",
"naked pair",
"pointing pair",
"naked triple"
]
}
],
"symmetry": "180-degree",
"elapsed_ms": 2100,
"unique_solution": true
}
}Tags
x402
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